package cn.tedu._03vehicle.base.filters;

import cn.tedu._03vehicle.pojo.vo.UserLoginVo;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.web.servlet.ServletComponentScan;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
@Slf4j
@WebFilter(filterName = "LoginCheckFilter", urlPatterns = {"/v1/vehicle/*"})
public class LoginCheckFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        Filter.super.init(filterConfig);
    }

    @Override
    public void destroy() {
        Filter.super.destroy();
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        log.debug("正在使用过滤器进行登录状态的校验,过滤器的核心方法");
        //HttpServletRequest是ServletRequest的子接口，所以可以强转
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        HttpSession session = request.getSession();
        UserLoginVo userLoginVo=(UserLoginVo)session.getAttribute("user");
        if(userLoginVo!=null){
            //放行
            //存在此语句过滤器直接放行,无此行代码就会拦截
            filterChain.doFilter(request,response);
        }else {
            response.sendRedirect("/login.html");
        }
    }
}
